# #81ff3d

A color — vivid. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#81ff3d`
- RGB: rgb(129, 255, 61)
- HSL: hsl(99, 100%, 62%)
- OKLCH: oklch(0.893 0.248 137.3)
- Relative luminance: 0.7652
- Nearest named color: Acid Green (#8ffe09, Δ 1.602) — https://brandsweets.com/colors/acid-green
- Moods: vivid
- Page: https://brandsweets.com/colors/81ff3d

## Tints & shades

- Tints (toward white): #8eff52, #98ff61, #a5ff75, #afff85, #bdff99, #caffad, #d4ffbd, #e1ffd1, #ebffe0, #f8fff5
- Shades (toward black): #6dff1f, #59ff00, #50e600, #46c700, #3ba800, #308a00, #256b00, #1d5200, #123300, #071400

## Harmonies

- Complementary: #bb3dff
- Analogous: #e2ff3d, #3dff5a
- Triadic: #3d81ff, #ff3d81
- Split-complementary: #5a3dff, #ff3de2
- Tetradic: #3de2ff, #bb3dff, #ff5a3d

## Colors that go with #81ff3d

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #81ff3d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/violet
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #81ff3d: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Zendesk (https://brandsweets.com/colors/brands/zendesk-com). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #81ff3d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Remix (https://brandsweets.com/colors/brands/remix-run), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #81ff3d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/hotpink
- **Blue** #0000ff [pool] — Two real palettes: Robinhood's brand system and MongoDB's brand system put Blue beside #81ff3d, as the supporting colour. Seen in: Robinhood (https://brandsweets.com/colors/brands/robinhood-com), MongoDB (https://brandsweets.com/colors/brands/mongodb-com). — https://brandsweets.com/colors/blue
- **Lime Green** #32cd32 [pool] — Two real palettes: Duolingo's brand system and Monster Energy's brand system put Lime Green beside #81ff3d, as the lead colour. Seen in: Duolingo (https://brandsweets.com/colors/brands/duolingo), Monster Energy (https://brandsweets.com/colors/brands/monsterenergy-com). — https://brandsweets.com/colors/limegreen
- **Red** #ff0000 [pool] — Red is paired with #81ff3d in two real palettes: Wise's brand system and Gatorade's brand system, as the lead colour. Seen in: Wise (https://brandsweets.com/colors/brands/wise-com), Gatorade (https://brandsweets.com/colors/brands/gatorade-com). — https://brandsweets.com/colors/red
- **Lilac** #c8a2c8 [harmony: split] — Lilac is a split-complement of #81ff3d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lilac

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 1.29:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2e8500 (4.7:1); AA: background → #636363 (4.66:1); AAA: text → #246600 (7.06:1); AAA: background → #474747 (7.21:1)
- On black (#000000): 16.3:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/81ff3d-a8bea2-664edf-1f2d21-f0f1e9?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#81ff3d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.